main {
  width: 400px;
  height: 225px;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  border: solid 1px #fff;
  background: url('/fengjing.png') no-repeat center;
  background-size: 100% 100%;

}

div {
  display: flex;
  justify-content: center;
  align-items: center;
}

.frosted-glass {
  width: 300px;
  height: 100px;
  background: rgba(43, 32, 12, 0.6) border-box;
  border-radius: 5px;
  overflow: hidden;
  /* box-shadow: 0 0 0 1px f inset, 0 0.5em 1em rgb(0 0 0 / 60%); */
  /* text-shadow:0 1px 1px hsla(0,0%,100%,.3); */

  box-shadow: 0 0 0 px rgba(255, 255, 255, .3) inset, 0 8px 20px rgba(0, 0, 0, 0.3);
  text-shadow: 0 1px 1px rgba(255, 255, 255, .3);
}

/* ------------------------- */

.frosted-glass:nth-of-type(2) {
  width: 300px;
  height: 100px;
  position: relative;
  margin: 300px auto;

  background: hsla(0, 0%, 0%, .25) border-box;
  border-radius: 5px;
  overflow: hidden;
  box-shadow: 0 0 0 1px hsl(0deg 0% 100% / 30%) inset, 0 0.5em 1em rgb(0 0 0 / 60%);
  text-shadow: 0 1px 1px hsla(0, 0%, 100%, .3);
}

.frosted-glass:nth-of-type(2)::before {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  z-index: -1;
  filter: blur(20px);
}